685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING
685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING
685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING
Model
685

Item specifics

Color
Silver
Inner Diameter
5 mm
Outer Diameter
11mm
Width
3mm

Review

Description

685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING

685 bearing
Bore diameter:
 5 mm
Basic dynamic load rating
0,715 kN
Outside diameter:
11 mm
Basic static load rating
 0,281 kN
Overall width:
3 mm
(Grease) Lubrication Speed
45 000 r/min
Rows of Balls
Single
(Oil) Lubrication Speed
 53 000 r/min
Outer ring type:
Unsplit
Load Direction
Radial
Radial clearance class
 CN (Standard)
Mass
0,0012 Kg
Closure type:
ZZ
Precision
Grade 0
Material
 Chrome Steel
r min
0,15 mm
Cage Material
 Sheet Steel
da min
6,2 mm
Type of lubrication:
 Grease Lubrication
Da max
9,8 mm

685 Bearing Short Description

  • Miniature ball bearing with smallest dimensions

  • Suitable for high radial loads and light axial loads in both directions

  • Suitable for high running accuracy, quiet running, and very high speeds

  • Seal: contact lip cover on both sides made of metal (ZZ) for high sealing effect

  • 685 bearing has good fixed bearing property, but can also be used as a floating bearing, each in both directions

Reasons for The Failure of Miniature Bearings

About 40% of the failures of ball miniature bearings are caused by dust, dirt, debris contamination, and corrosion.


Pollution is usually caused by incorrect use and poor use environment. Therefore, it can also cause torque and noise problems. However, miniature bearing failure caused by environment and pollution can be prevented. And the cause of such failure can be determined through simple visual observation.


As long as the use and installation are reasonable, the erosion of miniature bearings is easy to avoid. Therefore, the feature of erosion is that there are indentations on the raceway of the miniature bearing ring caused by impact load or incorrect installation. Erosion usually occurs when the load exceeds the yield limit of the material.


If the installation is not correct so that a certain load traverses the miniature bearing ring, corrosion will also occur. The pressure pits on the miniature bearing ring can also generate noise, vibration, and additional torque.

685 Bearing Application

Miniature bearings are suitable for various industrial equipment, small rotary motors, and other high-speed and low-noise fields, such as:
Office equipment, micro motors, instruments, laser engraving, small clocks, soft drives, pressure rotors, dental drills, hard disk motors, stepping motors, video recorder drums, toy models, computer cooling fans, currency counters, fax machines, and so on related fields.